Spacer for a reinforcement layer, reinforcement system for a concrete component, and method for the production of a reinforcement system

Abstract

The spacers (1) described allow especially mesh-type reinforcement layers (16) to be kept at a distance from other bodies (24, 28) in a particularly simple manner. The spacers (1) are fitted by inserting them into a mesh (8) of the reinforcement layer (16) and connecting them thereto by twisting.

The invention claimed is: 
     
       1. A Spacer ( 1 ) for a first reinforcement layer ( 16 ), with which ( 1 ) a distance, in the spacer's axial direction (z), between the first reinforcement layer ( 16 ) and at least one other body ( 24 ,  28 ) is adjustable and comprising:
 at least one distancing body ( 6 ) extending in the axial direction (z), 
 at least one securing system ( 3 ), which acts substantially in a first plane (E 1 ) defined by a peripheral direction (j) and a radial direction (r) of the spacer ( 1 ) and which is connected to the distancing body ( 6 ), 
 the securing system ( 3 ) having at least two connecting elements ( 11 ) for strands ( 8 ) or rods of the first reinforcement layer ( 16 ), 
 each of the connecting elements ( 11 ) having at least one groove ( 10 ) featuring a first ( 12 ) and a second ( 13 ) groove wall, whose longitudinal axis runs in the peripheral direction (j) of the spacer ( 1 ) and whose opening points outwards in the radial direction (r), 
 the spacer ( 1 ) having a principal axis of rotation ( 4 ) running in the axial direction (z), 
 ends ( 22 ) of the first groove walls ( 12 ) in the radial direction (r) being spaced from the principal axis of rotation ( 4 ) by distances (L 1 ), and the first groove wall ( 12 ) having a portion being substantially flat that opposes the second groove wall ( 13 ), 
 and, in angular portions (WA) lying between the connecting elements ( 11 ) in the peripheral direction (j), the securing system ( 3 ) having a reach (L 2 ) which, in the radial direction (r) in the second plane (E 2 ) defined by the first groove walls ( 12 ), is smaller than the distance (L 1 ), 
 at least one limit stop ( 15 ), which is located outside the plane (E 1 ) defined by the first groove walls ( 12 ) and whose edge, at the end facing radially (r) away from the principal axis of rotation ( 4 ), is spaced from the principal axis of rotation ( 4 ) by a distance L 3 , which is greater than L 1 . 
 
     
     
       2. The Spacer ( 1 ) according to  claim 1 , wherein
 the at least two connecting elements ( 11 ) are attached at the ends of legs ( 5 ), which run in the radial direction (r) 
 
       and/or
 the at least two connecting elements ( 11 ) are carried by a disc ( 25 ). 
 
     
     
       3. The Spacer ( 1 ) according to  claim 1 , wherein at least one of the two groove walls ( 12 ,  13 ) of at least one groove ( 10 ) of the spacer ( 1 ) is elastically deformable, at least section-wise, during insertion of a fibre strand ( 8 ). 
     
     
       4. The Spacer ( 1 ) according to  claim 1 , wherein at least one of the two groove walls ( 12 ,  13 ) of at least one groove ( 10 ) of the spacer ( 1 ) is provided with a protrusion ( 20 ), which projects into the interior of the groove ( 10 ). 
     
     
       5. The Spacer ( 1 ) according to  claim 1 , wherein the at least one distancing body ( 6 ) is connected releasably to the at least one securing system ( 3 ). 
     
     
       6. The Spacer ( 1 ) according to  claim 1 , wherein the at least two connecting elements ( 11 ) of at least one securing system ( 3 ) of the spacer ( 1 ) are distributed uniformly around the principal axis of rotation ( 4 ) in the peripheral direction (φ). 
     
     
       7. The Spacer ( 1 ) according to  claim 1 , wherein at least two securing systems ( 3 ), which are offset relative to one another in the axial direction (z) and are connected releasably or inseparably and, in the peripheral direction (j), rotatably or rigidly by distancing elements ( 6 ). 
     
     
       8. A Reinforcement system ( 29 ) for a concrete component, the system comprising:
 a first reinforcement layer ( 16 ) comprising reinforcement strands ( 8 ) or reinforcement rods ( 8 ) that intersect at cross-over points ( 18 ), a plurality of strand or rod sections ( 8 ), each of which extends between two adjacent crossover points ( 18 ), forming a mesh ( 2 ) of the reinforcement layer ( 16 ), 
 at least one spacer ( 1 ) according to  claim 1  featuring an axially (z) extending distancing body ( 6 ) and at least one securing system ( 3 ), which is connected to the distancing body ( 6 ), and at least one limit stop ( 15 ), which is located outside the plane (E 1 ) defined by the first groove walls ( 12 ) and whose edge, at the end facing radially (r) away from the principal axis of rotation ( 4 ), is spaced from the principal axis of rotation ( 4 ) by a distance L 3 , which is greater than L 1 , 
 wherein the securing system ( 3 ) comprising at least two connecting elements ( 11 ), each with at least one groove ( 10 ) in which at least one strand or rod section ( 8 ) of the mesh ( 2 ) of the reinforcement layer ( 16 ) is accommodated at a connection site ( 7 ) of the strand or rod section, and the limit stop ( 15 ) being in contact with the reinforcement layer ( 16 ), 
 wherein the distance between the connection sites ( 7 ) and the geometric centre of the mesh ( 2 ) being smaller than the distance between the geometric centre and the cross-over points ( 18 ) of the reinforcement layer mesh ( 2 ), 
 and wherein the distance between the ( 16 ) and a further body ( 24 ,  28 ) being adjustable by the distancing body ( 6 ). 
 
     
     
       9. The Reinforcement system ( 29 ) according to  claim 8 , wherein the reinforcement system has at least two reinforcement layers ( 16 ) with or without a space between them and the at least one spacer ( 1 ) is directly connected with the at least two reinforcement layers ( 16 ). 
     
     
       10. The Reinforcement system ( 29 ) according to  claim 9 , wherein the reinforcement contains fibre strands. 
     
     
       11. A Method for production of a reinforcement system ( 29 ), the method comprising:
 Provision of a reinforcement ( 16 ) comprising strands or rods ( 8 ) that intersect at cross-over points ( 18 ), a plurality of strand or rod sections ( 8 ), each of which extends between two adjacent cross-over points ( 18 ), forming a mesh ( 2 ) of the reinforcement, 
 Provision of at least one spacer ( 1 ) according to  claim 1  comprising at least one distancing body ( 6 ) extending in its axial direction (z), a limit stop ( 15 ), which is located outside the plane (E 1 ) defined by the first groove walls ( 12 ) and whose edge, at the end facing radially (r) away from the principal axis of rotation ( 4 ), is spaced from the principal axis of rotation ( 4 ) by a distance L 3 , which is greater than L 1 , and at least one securing system ( 3 ), the securing system ( 3 ) comprising at least two connecting elements ( 11 ) each of which has at least one groove ( 10 ) whose longitudinal axis runs in the peripheral direction (j) of the spacer ( 1 ) and whose opening points outwards in the radial direction (r), 
 Insertion of the securing system ( 3 ) of the at least one spacer ( 1 ) into the mesh ( 2 ) in such a manner that, along the principal axis of rotation ( 4 ), the grooves ( 10 ) are at the height of the strand or rod sections ( 8 ) of the mesh ( 2 ), 
 Twisting of the spacer ( 1 ) about its principal axis of rotation ( 4 ), the corresponding strands or rod sections ( 8 ) being received into the at least one groove ( 10 ). 
 
     
     
       12. Method according to  claim 11 , wherein the twisting movement is continued until the groove walls secure the strand or rod section in position. 
     
     
       13. Method according to  claim 12 , wherein on insertion into the mesh ( 2 ), each of the connecting elements ( 11 ) of the securing system ( 3 ) is oriented towards a cross-over point ( 18 ) of the reinforcement ( 16 ).